[go: up one dir, main page]

US20050175264A1 - Segmented ball/roller guide for a linear motion bearing - Google Patents

Segmented ball/roller guide for a linear motion bearing Download PDF

Info

Publication number
US20050175264A1
US20050175264A1 US10/505,923 US50592305A US2005175264A1 US 20050175264 A1 US20050175264 A1 US 20050175264A1 US 50592305 A US50592305 A US 50592305A US 2005175264 A1 US2005175264 A1 US 2005175264A1
Authority
US
United States
Prior art keywords
ball
rolling element
guide
spacer
leading
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/505,923
Other languages
English (en)
Inventor
Erick Kim
Alison Ng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thomson Linear LLC
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US10/505,923 priority Critical patent/US20050175264A1/en
Assigned to DANAHER MOTION reassignment DANAHER MOTION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KIM, ERIC, NG, ALISON
Publication of US20050175264A1 publication Critical patent/US20050175264A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/068—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track
    • F16C29/0683—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque
    • F16C29/0685—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque with balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/3818—Ball cages formed of unconnected segments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/51—Cages for rollers or needles formed of unconnected members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • F16H25/2233—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with cages or means to hold the balls in position
    • F16H25/2238—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with cages or means to hold the balls in position using ball spacers, i.e. spacers separating the balls, e.g. by forming a chain supporting the balls

Definitions

  • the present invention relates generally to anti-friction linear motion bearing assemblies. More particularly, the present invention is directed to a segmented ball/roller guide assembly utilized to eliminate vibrations caused by ball-to-ball contact in linear motion bearings.
  • Linear bearings or ball screws are well known for their significant reduction in dynamic and static friction versus plain bearings or lead screws under load. There are different types of linear bearings and ball screws offered on the market today. However, they share a common focus to control ball recirculation properly to provide smooth linear or rotary motion.
  • Typical linear rolling bearing assemblies include a series of rolling elements moving about a circulation path which circulation path is formed in the periphery of a track member and a surrounding and enclosing bearing cover confining the rolling elements in their recirculation path.
  • the axis of the bearing assembly In order to achieve an accurate linear motion, the axis of the bearing assembly must be precisely aligned with the desired direction of motion along the supported structure. In addition this precise alignment also minimizes skewing forces acting on the bearing assembly, which skewing forces tend to reduce the load/life performance of the bearing assembly.
  • bearing assemblies typically involves precision machining of locating surfaces in order to properly align the bearing assembly on the supporting structure.
  • Such bearing assemblies are typically installed in sets, each comprised of a number of variously facing bearings such as to engage a series of surfaces on the supporting structure (i.e., such as above and below a supporting surface and/or along a lateral edge of a supporting surface).
  • considerable precision machining of the supported structure is necessitated which is difficult and expensive to accomplish on the supporting structures.
  • Such low friction is particularly advantageous in structures related to biased linear motion bearing assemblies of the type, which support a carriage or a pillow block for linear movement along an elongated splined shaft.
  • These bearing assemblies can either be of the open type or the closed type.
  • the ball-to-ball contact in the ball track generates adverse conditions when the bearing is in operation.
  • the ball-to-ball contact generates mechanical and/or acoustic vibrations.
  • Radial bearing industries created ball cage technology to eliminate vibration due to ball-to-ball contact.
  • recent developments in linear bearing technologies are working toward elimination of the ball-to-ball contact itself.
  • Rolling element chains are designed to contain a row of rolling elements, i.e., a ball, as one subassembly with separators between the rolling elements to avoid ball-to-ball contact.
  • An example of one such rolling element chain is disclosed in U.S. Pat. No. 5,947,605 to Shirai.
  • the rolling element chain is made usually from very flexible material to allow ball recirculation. Additionally, careful material selection improves the vibration dampening characteristics of the ball chain.
  • the rolling element chain also has its drawbacks.
  • the rolling element chain does not provide designers with much freedom in designing ball track geometry. Due to the single chain mechanism, rolling elements must follow a track geometry that is normal or nearly normal to the direction of an applied load on the ball track. This restricts the location of the return track geometry for the ball track and often results in an unwanted outside bearing envelope dimension increase or modification due to the location of return geometry for the rolling elements. If the bearing requires a very strict return geometry away from the direction normal to the applied load on the ball track, the rolling element chain must be made from very flexible material to allow more twist. However, this is a very undesirable design due to long term effects on the material when it is twisted constantly.
  • Ball spacers are individual pieces of a material, such as a resin or polymer, which separate rolling elements in a bearing or ball screw. Ball spacers allow elimination of ball-to-ball contact without the restrictions provided by the rolling element chain. Individual ball spacers do not have connections between them like the rolling element chain and allow designers to implement ball-to-ball separators without major change in ball track geometry.
  • ball spacers allow more freedom in designing ball return geometry, they do have disadvantages. Due to the use of individual spacers, designers must ensure the spacers will not fall out of its position during operation. If the spacers are dropped out of its position between the balls to the bottom or sides of the ball track, they will create severe impediments to linear motion. This could result in a catastrophic failure on the bearings.
  • U.S. Pat. No. 6,352,367 illustrates the above-discussed drawback by disclosing a spacer located between adjacent rolling elements and configured so that if the distance between the balls exceeds the outer dimension of the spacer, it can be easily displaced off a ball track, which leads to the consequences discussed above.
  • the inventive ball/roller guide assembly has a guide configured to support and guide at least one rolling element so that, even if a distance between adjacent rolling elements displaceable along a ball track becomes large enough for the guide to drop off the track, it remains on the track. Accordingly, since the guide is prevented from unacceptable displacement that, otherwise, could result in impediments to the linear motion, it maintains the desired alignment between adjacent rolling elements along the ball track eliminating.
  • the segmented ball/roller guide of the present invention includes a first spacer member, a second spacer member and at least one connection member for connecting and supporting the first and second spacer at an equal diametrical distance around a ball bearing.
  • the first and second spacer members are formed generally in a disc-like shape and may be formed with at least one concave surface so when assembled the ball bearing will be rotatably held within the segmented ball/roller guide.
  • the guide is dimensioned to maintain a substantially continuous sliding contact with the thus supported ball baring. In use, the ball bearing will circulate on a ball track of a linear motion bearing with the spacers preventing ball-to-ball contact.
  • each segmented ball/roller guide includes two spacer members, only one segmented ball/roller guide is required for every other ball of a plurality of balls placed on the ball track of a linear motion bearing. Additionally, the connection member acts as a guide for the ball when circulating around the ball track.
  • FIG. 1 is a perspective view of a first embodiment of a segmented ball guide assembly in accordance with the present invention
  • FIG. 2 is a plan front view of the first embodiment of a segmented ball guide assembly in accordance with the present invention
  • FIG. 3 is a perspective view of the segmented ball guide of FIG. 1 with the ball removed;
  • FIG. 4 is a perspective view of the support/guide structure of the segmental ball guide sown in FIG. 1 in accordance with the present invention
  • FIG. 4A is a cross-sectional view taken along lines I-I in FIG. 4 ;
  • FIG. 5 is a perspective view of another embodiment of a support/guide structure of a segmented ball guide in accordance with the present invention.
  • FIG. 6 is a perspective view of still another embodiment of a support/guide structure of a segmented ball guide in accordance with the present invention.
  • FIG. 7 illustrates a plurality of segmented ball guide assemblies located in a load bearing portion of a ball track of a linear bearing assembly
  • FIG. 8 is an enlarged view of FIG. 7 ;
  • FIG. 9 is a perspective view of a still another embodiment of a segmented ball guide in accordance with the present invention.
  • a segmented ball/roller guide in accordance with the present invention is identified generally by the reference numeral 10 .
  • FIGS. 1-5 illustrates a segmented ball/roller guide assembly 100 with a ball bearing contained therein.
  • the segmented ball/roller guide 10 of the present invention includes at least one first spacer member 12 . While the first spacer member 12 can completely or partially surround a rolling element, such as a ball bearing 20 , as will be discussed hereinbelow, many of the inventive modifications of the support/guide 10 include a second spacer 14 .
  • the spacers 12 and 14 are spaced from one another along a travel direction and function as a guard preventing contact between adjacent ball bearings 20 travelling along a track. The distance between the spacers 12 and 14 may be selected so that it is at least slightly greater than the outer diameter of the ball bearing 20 .
  • the inventive assembly includes at least one first connection member 16 ( FIG. 5 ), but, preferably, two connection members 16 and 18 , as better illustrated in FIGS. 1-4 .
  • the first and second spacer members 12 , 14 may be formed with seats each having a respective concave surface 22 , 24 (see FIG. 3 ) extending complementary to the regions 21 , 23 of the ball bearings 20 . Accordingly, when assembled, the ball bearings 20 will be rotatably held within the segmented guide 10 and, even if a distance between adjacent ball bearings 200 - 206 ( FIG. 8 ) is unacceptably increased, the guide 10 remains in sliding contact with the guided ball baring. In practical terms, the guide 10 cannot be displaced from its position between adjacent ball bearings running along a circulation passage of a ball track formed in a bearing carriage regardless of their relative position along the ball track.
  • the spacer members 12 , 14 will have concave surfaces formed on both sides 24 , 26 one to retain the ball 20 and one for contact with an adjacent ball when in motion, the operation of which will be described below.
  • the inner surfaces 22 , 24 can be flat or even convex to still provide contact with the leading 23 and trailing 21 regions of the ball bearing 20 .
  • FIGS. 4 through 6 illustrate various embodiments of the segmented ball/roller guide. Fundamentally, the variations in the different embodiments are in the number and structure of the connection members. As shown in FIG. 5 , the ball/roller guide 10 includes only one connection member 16 , whereas the embodiment shown in FIG. 6 , has one of the connection members recessed. The geometry and particular structure of the connection members 16 , 18 depend the particular design of the ball track. Advantageously, bottoms 17 and 19 of the connection elements 16 , 18 are narrowed to have an arcuate or substantially conical shape ( FIG. 4A ), which will reduce a contact area and, consequently, frictional forces between the connection elements and side surfaces of the ball track. Operationally, the embodiments shown in FIGS. 4 through 6 are functionally similar.
  • connection elements 16 and 18 can be detachably coupled to one another by various fasteners.
  • the guide can be configured to have all of the components machined with surfaces extending complementary to and matching one another during the assembly of the guide 10 .
  • the spacers 12 , 14 each can have recesses receiving complementary formed projections of the connection elements 16 , 18 .
  • the components of the ball/roller guide can be made integrally or unitarily from a variety of materials including engineering polymers and thermoplastics characterized by a low-friction coefficient.
  • FIGS. 7 and 8 show a ball retainer segment or bearing carriage 72 of a linear bearing assembly 70 .
  • the ball retainer segment 72 includes a ball track 74 having a load bearing portion 76 , a return portion 78 and a turnaround portion 80 . Since each segmented ball/roller guide 10 includes two spacer members 12 and 14 , only one segmented ball/roller guide 10 is required for every other ball of a plurality of balls placed on the ball track 74 of linear bearing 70 .
  • Spacer members 12 and 14 will retain a first ball 200 and a second ball 202 will circulate in the outer concave surface 26 of spacer member 14 and an outer concave surface (not shown) of spacer member 12 of the next adjacent guide 10 .
  • the balls 200 , 202 , 204 , 206 circulate to provide linear motion the spacer member 12 , 14 will eliminate ball-to-ball contact.
  • the connection member or members 16 , 18 act as a guide for the balls 20 when circulating around the ball track 74 while preventing the displacement of the balls off the track.
  • FIG. 9 illustrates a fifth embodiment of the segmented ball guide.
  • the guide 90 is formed as an annular member having an inner surface 92 , an outer surface 94 , a top surface 96 and a bottom surface 98 .
  • the guide is preferably formed with flat surfaces.
  • the inner surface 92 and outer surface 94 may be formed in a concave shape to minimize the spacing between balls 20 .
  • the annular member 90 will act as a guide for the balls when circulating around the ball track.
  • the present invention allows the benefits of both the rolling element chain and ball spacers to be used without the associated disadvantages.
  • the segmented ball/roller guide of the present invention acts in very much the same manner as the rolling element chain without the disadvantage of limited twist. By not having the individual segmented ball guide assemblies connected to each other, an infinite amount of twist between the ball guides is possible resulting in a great amount of flexibility in designing the return track geometry.
  • segmented ball/roller guide is not in danger of falling out of position when the gap between rolling elements, i.e. bearing balls, increases over time as occurs with ball spacers. This is achieved by the connection member or members 16 , 18 between the ball spacer members. This allows designers of linear bearings to ease the tolerance requirements in ball track geometry. This also allows designers freedom to choose either hard or soft material for the segmented ball/roller guide since changes in the gap distance between balls will not result in catastrophic failure.
  • the ball bearing 20 can be incorporated in radial bearings.
  • Outer surface 85 ( FIG. 9 ) of at least one of the spacers 12 , 14 can be recessed along the trailing or leading regions 23 , 21 of the rolling element 20 so that a shape and size of recess allows an adjacent ball bearing to be guided and supported.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Rolling Contact Bearings (AREA)
  • Transmission Devices (AREA)
US10/505,923 2002-02-27 2003-02-27 Segmented ball/roller guide for a linear motion bearing Abandoned US20050175264A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/505,923 US20050175264A1 (en) 2002-02-27 2003-02-27 Segmented ball/roller guide for a linear motion bearing

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US36015502P 2002-02-27 2002-02-27
US10/505,923 US20050175264A1 (en) 2002-02-27 2003-02-27 Segmented ball/roller guide for a linear motion bearing
PCT/US2003/005653 WO2003072966A1 (fr) 2002-02-27 2003-02-27 Guide segmente pour boules/rouleau pour vis a billes de mouvement

Publications (1)

Publication Number Publication Date
US20050175264A1 true US20050175264A1 (en) 2005-08-11

Family

ID=27766197

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/505,923 Abandoned US20050175264A1 (en) 2002-02-27 2003-02-27 Segmented ball/roller guide for a linear motion bearing

Country Status (9)

Country Link
US (1) US20050175264A1 (fr)
EP (1) EP1488119B1 (fr)
KR (1) KR20040111370A (fr)
CN (1) CN1650114A (fr)
AU (1) AU2003225600A1 (fr)
CA (1) CA2477628C (fr)
DE (1) DE60315611T2 (fr)
MX (1) MXPA04008238A (fr)
WO (1) WO2003072966A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070081746A1 (en) * 2005-10-07 2007-04-12 Hiwin Technologies Corp. Parallel spacer for a linear guideway
US20080000320A1 (en) * 2004-07-30 2008-01-03 Schaeffler Kg Ball Screw
US20100129012A1 (en) * 2008-11-24 2010-05-27 Ming-Yao Lin Rolling element retainer
US20100195948A1 (en) * 2009-02-02 2010-08-05 Hamilton Sundstrand Corporation Separator for bearing assemblies with cyclic loads
US20110311175A1 (en) * 2009-01-28 2011-12-22 The Timken Company Oscillating Ball Bearing
EP2518352A1 (fr) * 2011-04-29 2012-10-31 Aktiebolaget SKF Palier à roulement linéaire
US20180112707A1 (en) * 2015-05-22 2018-04-26 Nsk Ltd. Rolling guide apparatus
US10190576B2 (en) * 2006-03-10 2019-01-29 Ntn Corporation Roller bearing, retainer segment, spacer and main shaft support structure of wind-power generator
US20250215929A1 (en) * 2024-01-02 2025-07-03 Aktiebolaget Skf Low wear toroid separator for ball bearings

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100529447C (zh) * 2003-09-24 2009-08-19 上银科技股份有限公司 滚动元件保持器
CN1321278C (zh) * 2003-10-31 2007-06-13 上银科技股份有限公司 滚动元件保持器
CN100365297C (zh) * 2003-11-03 2008-01-30 上银科技股份有限公司 滚动元件导引结构
DE10354064A1 (de) * 2003-11-19 2005-06-02 Ina-Schaeffler Kg Rollengewindetrieb
US8146453B2 (en) 2005-02-07 2012-04-03 Thk Co., Ltd. Motion guide device
CN100427803C (zh) * 2005-09-08 2008-10-22 上银科技股份有限公司 间隔珠配置装置
DE102009008996A1 (de) 2009-02-14 2010-08-19 Neo-Plastic Dr. Doetsch Diespeck Gmbh Abstandhalter für Wälz- und/oder Klemmkörper
US8702309B2 (en) * 2010-07-15 2014-04-22 Thomson Industries, Inc. Linear motion bearing with plate retaining structure having a plurality of pieces
TWI601888B (zh) * 2016-11-04 2017-10-11 Hiwin Tech Corp Spacer flexible bearings
DE202017107296U1 (de) 2017-09-08 2018-12-12 Liebherr-Components Biberach Gmbh Wälzlager
CN109225828B (zh) * 2018-10-21 2021-11-19 山东耀华特耐科技有限公司 耐火材料颗粒料振动式筛分设备
US11545380B2 (en) * 2018-11-01 2023-01-03 Brooks Automation Us Llc Transport apparatus with linear bearing
CN112727917B (zh) * 2021-01-25 2022-04-15 河南科技大学 一种低摩擦力矩的滚子轴承

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937532A (en) * 1974-04-03 1976-02-10 Industriewerk Schaeffler Ohg Novel recirculating bearing
US4944607A (en) * 1988-07-16 1990-07-31 Werner Jacob Revolving guiding means for rolling members
US5346313A (en) * 1993-07-20 1994-09-13 Thomson Industries, Inc. Linear motion bearing assembly
US5558442A (en) * 1993-07-20 1996-09-24 Thomson Industries, Inc. Linear motion bearing assembly
US5613780A (en) * 1995-06-29 1997-03-25 Thomson Industries, Inc. Linear motion bearing assembly
US5927858A (en) * 1997-04-04 1999-07-27 Nippon Thompson Co., Ltd. Linear motion rolling guide unit
US5947605A (en) * 1996-06-18 1999-09-07 Thk Co., Ltd. Linear motion guide apparatus equipped with a plurality of rows of ball chains
US6102572A (en) * 1998-03-04 2000-08-15 Nippoon Thompson Co., Ltd. Linear motion guide units
US6247846B1 (en) * 1999-01-29 2001-06-19 Thk Co., Ltd. Rolling element and rectilinearly-movable apparatus using the rolling element
US6347558B1 (en) * 1998-06-02 2002-02-19 Nsk Ltd. Ball screw device and linear motion device
US6352367B1 (en) * 1999-04-30 2002-03-05 Thk Co., Ltd Spacer for liner motion apparatus and liner motion apparatus provided with spacer
US6619845B2 (en) * 2000-03-21 2003-09-16 Thk Co., Ltd. Roller retainer, direct-acting guide device and roller screw using the roller retainer
US20040184685A1 (en) * 2001-08-07 2004-09-23 Thk Co., Ltd. Rolling element interference preventer and a guide device
US20080000320A1 (en) * 2004-07-30 2008-01-03 Schaeffler Kg Ball Screw

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3243415B2 (ja) * 1996-06-27 2002-01-07 テイエチケー株式会社 摺動案内装置及びその有端転動体チェーン
JPH11270559A (ja) * 1998-03-25 1999-10-05 Nippon Seiko Kk ボール保持器
US6565947B2 (en) * 2000-01-11 2003-05-20 Nsk Ltd. Retaining piece structure

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937532A (en) * 1974-04-03 1976-02-10 Industriewerk Schaeffler Ohg Novel recirculating bearing
US4944607A (en) * 1988-07-16 1990-07-31 Werner Jacob Revolving guiding means for rolling members
US5346313A (en) * 1993-07-20 1994-09-13 Thomson Industries, Inc. Linear motion bearing assembly
US5558442A (en) * 1993-07-20 1996-09-24 Thomson Industries, Inc. Linear motion bearing assembly
US5613780A (en) * 1995-06-29 1997-03-25 Thomson Industries, Inc. Linear motion bearing assembly
US5947605A (en) * 1996-06-18 1999-09-07 Thk Co., Ltd. Linear motion guide apparatus equipped with a plurality of rows of ball chains
US5927858A (en) * 1997-04-04 1999-07-27 Nippon Thompson Co., Ltd. Linear motion rolling guide unit
US6102572A (en) * 1998-03-04 2000-08-15 Nippoon Thompson Co., Ltd. Linear motion guide units
US6347558B1 (en) * 1998-06-02 2002-02-19 Nsk Ltd. Ball screw device and linear motion device
US6247846B1 (en) * 1999-01-29 2001-06-19 Thk Co., Ltd. Rolling element and rectilinearly-movable apparatus using the rolling element
US6352367B1 (en) * 1999-04-30 2002-03-05 Thk Co., Ltd Spacer for liner motion apparatus and liner motion apparatus provided with spacer
US6619845B2 (en) * 2000-03-21 2003-09-16 Thk Co., Ltd. Roller retainer, direct-acting guide device and roller screw using the roller retainer
US20040184685A1 (en) * 2001-08-07 2004-09-23 Thk Co., Ltd. Rolling element interference preventer and a guide device
US20080000320A1 (en) * 2004-07-30 2008-01-03 Schaeffler Kg Ball Screw

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080000320A1 (en) * 2004-07-30 2008-01-03 Schaeffler Kg Ball Screw
US7806017B2 (en) * 2004-07-30 2010-10-05 Schaeffler Kg Ball screw
US20070081746A1 (en) * 2005-10-07 2007-04-12 Hiwin Technologies Corp. Parallel spacer for a linear guideway
US10190576B2 (en) * 2006-03-10 2019-01-29 Ntn Corporation Roller bearing, retainer segment, spacer and main shaft support structure of wind-power generator
US20100129012A1 (en) * 2008-11-24 2010-05-27 Ming-Yao Lin Rolling element retainer
US8100025B2 (en) * 2008-11-24 2012-01-24 Hiwin Technologies Corp. Rolling element retainer
US20110311175A1 (en) * 2009-01-28 2011-12-22 The Timken Company Oscillating Ball Bearing
US20100195948A1 (en) * 2009-02-02 2010-08-05 Hamilton Sundstrand Corporation Separator for bearing assemblies with cyclic loads
US8167501B2 (en) 2009-02-02 2012-05-01 Hamilton Sundstrand Corporation Separator for bearing assemblies with cyclic loads
EP2518352A1 (fr) * 2011-04-29 2012-10-31 Aktiebolaget SKF Palier à roulement linéaire
US20180112707A1 (en) * 2015-05-22 2018-04-26 Nsk Ltd. Rolling guide apparatus
US10955034B2 (en) * 2015-05-22 2021-03-23 Nsk Ltd. Rolling guide apparatus
US20250215929A1 (en) * 2024-01-02 2025-07-03 Aktiebolaget Skf Low wear toroid separator for ball bearings
US12492727B2 (en) * 2024-01-02 2025-12-09 Aktiebolaget Skf Low wear toroid separator for ball bearings

Also Published As

Publication number Publication date
CA2477628C (fr) 2012-03-20
DE60315611D1 (de) 2007-09-27
CN1650114A (zh) 2005-08-03
KR20040111370A (ko) 2004-12-31
DE60315611T2 (de) 2008-06-05
WO2003072966A1 (fr) 2003-09-04
AU2003225600A1 (en) 2003-09-09
EP1488119B1 (fr) 2007-08-15
MXPA04008238A (es) 2005-09-08
EP1488119A1 (fr) 2004-12-22
CA2477628A1 (fr) 2003-09-04

Similar Documents

Publication Publication Date Title
CA2477628C (fr) Guide segmente pour boules/rouleau pour vis a billes de mouvement
US7159481B2 (en) Ball screw device and linear motion device
DE4327815C2 (de) Kugellager für einen Turbolader
CA2426792C (fr) Segment de palier a mouvement lineaire
EP1186790B1 (fr) Séparateur de billes pour dispositifs de guidage à roulement
US7070334B2 (en) Ball Bearing
CN1354067A (zh) 导向装置
JP4294199B2 (ja) 転がり案内装置の転動体スペーサ
JP5463687B2 (ja) 転がり軸受
US20010037699A1 (en) Rolling element spacer for rolling guide device
US6941831B2 (en) Ball screw apparatus
US7159484B2 (en) Linear motion device
US11852195B2 (en) Bearing cage and rolling bearing with the same
US4303280A (en) Open antifriction bearings and method of operating the same
JP4280376B2 (ja) 直動転がり案内ユニット
CN100416118C (zh) 分离器和使用该分离器的线性导引件以及线性运动装置
JP2000213538A (ja) 直動案内軸受装置
CN1846075B (zh) 线性导向装置
WO2004015287A1 (fr) Unite d'entrainement direct
CN115413311A (zh) 滚子轴承、滚子轴承单元、电动机、滚子轴承的制造方法及滚子轴承的静音方法
GB2397628A (en) Rolling element spacer in rolling guide device
JP2002021849A (ja) 直動案内軸受装置
JP2002206526A (ja) 転がり軸受

Legal Events

Date Code Title Description
AS Assignment

Owner name: DANAHER MOTION, NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, ERIC;NG, ALISON;REEL/FRAME:016483/0802

Effective date: 20050318

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION